About ambivalent groups

Ambivalent about Ambivalence: A Re-examination of Heteroskedastic Probit Models

While the derivation and estimation of heterogeneous probit models appears straightforward, the properties of such models are not well understood. It is assumed that the properties of these models are identical to those of discrete choice models, but this may not be true. While these models are formally identified, we argue that they suffer from fragile identification. We first look for evidenc...

Employees are ambivalent about health checks in the occupational setting.

BACKGROUND Employees are increasingly provided with preventive health checks. However, participation rates are low and several ethical issues arise, such as a potential perceived threat to autonomy and privacy. AIMS To assess what employees think about preventive health checks in the occupational setting. METHODS Samples of construction workers and the general working population in the Neth...

Ambivalent effect of member portraits in virtual groups

Knowledge exchange with shared databases can be seen as a public-goods dilemma. People are reluctant to contribute information because they save time, effort and perhaps social power if they withhold their knowledge and socially loaf. But if all people choose this individually efficient strategy, then no information exchange can take place, and the group is less effective than it would have bee...

About remainders in compactifications of paratopological groups

In this paper‎, ‎we prove a dichotomy theorem for remainders in‎ ‎compactifications of paratopological groups‎: ‎every remainder of a ‎paratopological group $G$ is either Lindel"{o}f and meager or‎ ‎Baire‎. Furthermore, ‎we give a negative answer to a question posed in [D‎. ‎Basile and A‎. ‎Bella‎, ‎About remainders in compactifications of homogeneous spaces‎, ‎Comment‎. ‎Math‎. ‎Univ‎. ‎Caroli...

Ambivalent jew